R Meir allows an amputee to go out with a wooden bottom fake leg. This leg is “like his shoe”, as it covers up that he’s missing a foot. R Yosi forbids this. The Gemara has much discussion whether the opinions are actually reversed, but this is the outcome of r Yosi forbidding.

This dispute between r Yosi and r Meir is relevant also in the laws of chalitza, when the woman takes off her brother in laws shoe. If she takes off her brothers in laws wooden shoe, it’s a dispute between r Meir and r Yosi.

There a sandal worn by those who work with plaster so their shoes don’t get ruined. This shoe is made from straw and sometimes worn all the way to the home. It’s a dispute whether it’s a “shoe” in regards to chalitza and wearing on Shabbos, and again, r Yosi would not consider it a shoe.

The wooden fake leg does not accept tumah bc it’s a wooden kli without a receptacle. If it’s has room for some soft rags to fit inside, it does accept tumah. The gemara has a dispute if this is only tumah from dead body or even tumas midras. Midras is reserved for items designated for sitting and placing ones weight, and the amputee does place his weight on it. On the other hand, its primary function is to hide his missing leg and not to support the weight.

Mishna mentions a double amputee who crawls on shins and knees. The amputee uses leather supports to crawl. He can go out with these supports on Shabbos. An amputee with no real usage of legs at all may go out with a low chair and hand crutches that he used to pick himself up and propel forward. However, if there are leg supports that attach to the stumps of his legs it’s forbidden, bc those easily fall off.

One cannot go out with masks used for play on Shabbos bc they are not a תכשיט or a מלבוש

When father separated from sons, the young boys could suffer from the separation. An Emotional remedy would be for the father to take a strap from his right shoe and tie in to the left arm of the son. The son may go out with this strap on Shabbos.

Although the rabbis don’t allow use of medicine on Shabbos, there are some healings that are ok bc they are not like potions at all. Like putting hot water on stomach, swaddling a baby to set limbs, rubbing water and oil to remove intoxication, “strangling” to set a vertebrae.

Abaye says many different ways of healing he heard from his “mother,” like for curing daily fevers.